This study describes a facile synthesis of calcium carbonate (CaCO3) monodispersed fine particles from an abundant indigenous and economical source (quicklime) and its enhanced tribological performance as a green additive in commercial lithium grease (CLG). The effects of various experimental parameters on particle morphology were thoroughly examined, and the conditions were optimized. The synthesized uniform particles were characterized by scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffractometry, and thermogravimetric (TG) /differential thermal analysis (DTA), and their results confirmed the calcite structure of the synthesized particles. The friction and wear studies were carried out under the applied load of 0.863 N at an ambient temperature for 5 min. The tribological performance of various amounts (1–7%) of cubic-CaCO3 (CCC) particles in CLG showed that 5 wt. % of CCC was the optimum concentration as additive in the present case. For comparison purposes, a commercial CaCO3 powder was used and a decrease in the friction coefficient of CLG was observed to be 33.4% and 16.4% for 5 wt. % CCC and commercial CaCO3 additives, respectively. The significantly enhanced antiwear and antifriction performance of the optimum CCC-CLG in comparison with the blank and commercial CaCO3-additized CLG was quite encouraging, and extensive studies in a real machine-operating environment are in progress for evaluation of the CCC-CLG blend to be used as an economical, green, and high-performance lubricant in mechanical components.
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Research-Article
Facile Synthesis of Uniform Calcite Microcubes and Their Enhanced Tribological Performance in Lithium-Based Commercial Grease
Khalida Akhtar,
Khalida Akhtar
1
National Centre of Excellence in Physical Chemistry,
Peshawar 25120, Khyber Pakhtunkhwa,
e-mail: khalidaakhtar@uop.edu.pk
University of Peshawar
,Peshawar 25120, Khyber Pakhtunkhwa,
Pakistan
e-mail: khalidaakhtar@uop.edu.pk
1Corresponding author.
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Abid Hussain,
Abid Hussain
National Centre of Excellence in Physical Chemistry,
Peshawar 25120, Khyber Pakhtunkhwa,
e-mail: abidturi@hotmail.com
University of Peshawar
,Peshawar 25120, Khyber Pakhtunkhwa,
Pakistan
e-mail: abidturi@hotmail.com
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Muhammad Gul,
Muhammad Gul
National Centre of Excellence in Physical Chemistry,
Peshawar 25120, Khyber Pakhtunkhwa,
e-mail: mg46asim@gmail.com
University of Peshawar
,Peshawar 25120, Khyber Pakhtunkhwa,
Pakistan
e-mail: mg46asim@gmail.com
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Hina Khalid,
Hina Khalid
National Centre of Excellence in Physical Chemistry,
Peshawar 25120, Khyber Pakhtunkhwa,
e-mail: hinakhd@yahoo.com
University of Peshawar
,Peshawar 25120, Khyber Pakhtunkhwa,
Pakistan
e-mail: hinakhd@yahoo.com
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Saniya Yousaf Zai
Saniya Yousaf Zai
National Centre of Excellence in Physical Chemistry,
Peshawar 25120, Khyber Pakhtunkhwa,
e-mail: yousafzaaai2468@gmail.com
University of Peshawar
,Peshawar 25120, Khyber Pakhtunkhwa,
Pakistan
e-mail: yousafzaaai2468@gmail.com
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Khalida Akhtar
National Centre of Excellence in Physical Chemistry,
Peshawar 25120, Khyber Pakhtunkhwa,
e-mail: khalidaakhtar@uop.edu.pk
University of Peshawar
,Peshawar 25120, Khyber Pakhtunkhwa,
Pakistan
e-mail: khalidaakhtar@uop.edu.pk
Abid Hussain
National Centre of Excellence in Physical Chemistry,
Peshawar 25120, Khyber Pakhtunkhwa,
e-mail: abidturi@hotmail.com
University of Peshawar
,Peshawar 25120, Khyber Pakhtunkhwa,
Pakistan
e-mail: abidturi@hotmail.com
Muhammad Gul
National Centre of Excellence in Physical Chemistry,
Peshawar 25120, Khyber Pakhtunkhwa,
e-mail: mg46asim@gmail.com
University of Peshawar
,Peshawar 25120, Khyber Pakhtunkhwa,
Pakistan
e-mail: mg46asim@gmail.com
Hina Khalid
National Centre of Excellence in Physical Chemistry,
Peshawar 25120, Khyber Pakhtunkhwa,
e-mail: hinakhd@yahoo.com
University of Peshawar
,Peshawar 25120, Khyber Pakhtunkhwa,
Pakistan
e-mail: hinakhd@yahoo.com
Saniya Yousaf Zai
National Centre of Excellence in Physical Chemistry,
Peshawar 25120, Khyber Pakhtunkhwa,
e-mail: yousafzaaai2468@gmail.com
University of Peshawar
,Peshawar 25120, Khyber Pakhtunkhwa,
Pakistan
e-mail: yousafzaaai2468@gmail.com
1Corresponding author.
Contributed by the Tribology Division of ASME for publication in the Journal of Tribology. Manuscript received October 1, 2018; final manuscript received January 24, 2019; published online March 11, 2019. Assoc. Editor: Min Zou.
J. Tribol. May 2019, 141(5): 052002 (9 pages)
Published Online: March 11, 2019
Article history
Received:
October 1, 2018
Revision Received:
January 24, 2019
Accepted:
January 25, 2019
Citation
Akhtar, K., Hussain, A., Gul, M., Khalid, H., and Yousaf Zai, S. (March 11, 2019). "Facile Synthesis of Uniform Calcite Microcubes and Their Enhanced Tribological Performance in Lithium-Based Commercial Grease." ASME. J. Tribol. May 2019; 141(5): 052002. https://doi.org/10.1115/1.4042677
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